"toller" wrote in message ...
You say it is a 30a outlet.
30a 240v or 120v?
3wire or 4wire?

I am going to "guess" it is a 30a 240v with 3wire. If so, then what you
want to do is impossible.


A subpanel requires 4wire.

TOTALLY FALSE!!!. In a DETACHED STRUCTURE, provided there are no other
metallic paths to the home, a 3 wire run is fine. You must bond at
the garage, and have a ground rod, but that is easy. If the garage is
attached, this would not be kosher but the garage is detached.
Remember the rule "leeves as a feeder, arrives as a service"


All you could do (and I doubt it would be legal with the old breaker box)
would be to change the circuit to 120v, run it to the box and take 2 or 3
120v circuits out of it.

If it is infact 4wire, then sure it can be done; but you probably don't want
to do it yourself.